version i used: https://www.curseforge.com/minecraft/mc-mods/quicksand-forge/files/4076969

log:
latest.log

debug log:
debug.log

To be honest, the provided logs seemed not helpful as they should be: there're no stack trace for the error, actually not even a single line of message about the error is provided. It seemed that the logger itself was also interrupted by some exception, which is very unexpected.

I need more valid crash reports / logs to figure out what exactly was happening. If you found it hard to reproduce a normal crash report / log, try switching to another launcher or reduce mods.

i am not able to start my launcher. yes, i have other mods installed.

Came across this while having the same issue. It seems to be Debugify (1.11.0-forge-1.18.2).
Since its author doesn't support Forge anymore anyway it's probably a good idea to drop Debugify, who knows how many undocumented bugs there are...